Suppose that f : R → R is a function such that f(x+y) = f(x)+f(y) for all x, y ∈ R. Prove that f has a limit at 0 iff f has a limit at every point c in R.

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =

Solve for b. ab + c= d b= a + old ob=allc-ch b= (d-c/a

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.